A train is moving along a track with constant speed V1 relative to the ground. A person on the train holds a ball of mass m and throws it toward the front of the train with a speed v2 relative to the train. Part A Calculate the change in kinetic energy of the ball in the Earth frame of reference. Express your answer in terms of the variables m, v1, and v2. AKEarth ΑΣΦ

Q: 1. Find the currents and voltages in the circuit using KVL and KCL. 2Ω 4Ω ww + 10 V(+ 8Ω 6 V + s!

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Q: A charge of 20 C flows out from a battery in 8 s. How much current passes through the lamp

A: We have to find the current passed through the lamp Current is defined as the rate of flow of charge…

Q: 3. Define Current Density.

A: Let a conductor is carrying a current "I". Let the area of cross section of the wire = A

Q: 6. 6. 3 6. 2 12 18 V Find the potential difference across the 4 ohm resistor.

A: In the given question, given that a circuit and We have to determine the potential difference across…

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Q: A drum, when rotating at 839 rev/min, has a kinetic energy of 0.56MJ. Find the moment of inertia

A: Solution: Given,   Speedw = 839 rev/minKinetic energyK.E = 0.56 MJ = 0.56 ×106J

Q: 2. Find Vo in the circuit 1,= 2 A + 28 V 6 A 12 V 1A 3 A 28 V 30 V 51, 6 A↑ +3 A

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Q: The current in a lightning bolt is 4.9 x 10° A. How much charge passes through a cross- sectional…

A: Given,  Current flowing through lightning bolt is, i=4.9×105A   And Current can be defined in terms…

Q: 38. Find the voltage across the 4 Ohm resistor. a) 8 v b) 10 V c) 12 V d) 14 V e) 16 V 30 4. 2 6

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Q: How much power is used by a contact lens heating unit that draws 0.04 A of current from a 194 V…

A: Given data:  Current (I) = 0.04 A Voltage (V) = 194 V Required: Power (P)

Q: 2. Find the drift velocity, if the voltage is 4 V, length is 60 cm, area is 2 m², resistance is 5 kN…

A: Voltage (V) = 4 volts Length (L) = 60 cm = 0.6 m Area (A) = 2 m2Resistance (R) = 5000 ohm Number of…

Q: Find the unknown quantity in the figure.

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Q: What current flows through a 2.54–cm–diameter rod of pure silicon that is 23.0 cm long, when 1150 V…

A: Write the given values of the problem- Length of the rod- L=23 cm L=0.23 m Diameter of the rod (d)…

Q: Which of the following I-V graph represents ohmic conductors? O a. Ob. レ. Od. IA

A: solution as

Q: mplete the table below. (Show your complete SoIutions) V 12 V R 2.0 A 7.9 A 3Ω 9 V 19.24 V 25 V 6.5…

A: We know according to Ohm's law, V=IR  or, I=V/R or, R=V/I

Q: 6. An electrical circuit has a 5.93-V battery wired to two resistors, 3.79 Ohms and 6.28 Ohms, in…

A: Given data: The resistances are, R1=3.79 Ohms R2= 6.28 Ohms The voltage of battery is V=5.93 V.

Q: 4. What is the power in watts of a 2.10 x 102 MV lightning bolt having a current of 1.74 x 104 A? W

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Q: According to the calibration curve of a potentiometer as shown, the voltage (in V) at the position…

A: Given  Voltage V  length L cm 0V  0 cm  2 V 30 cm 4V 60 cm From the given data we can…

Q: A lightning bolt carried a current of 2 kA and lasted for 3 ms. How many coulombs of charge were…

A: i=2 kA=2000 At=3 ms=0.003 s

Q: What is the length of a 0.127mm radius constantan wire at 20 C required for a 200 ohm resistor?

A: Given data:  A constantan wire at 20°C Radius (r) = 0.127 mm = 0.127×10-3 m Resistance (R) = 200 Ω…

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A: The number of electrons that flow downwards is, ne=1023/s. The number of protons that flow upwards…

Q: Find Vo? 9 k2 8 k2 4 k2 4 k2 Vo 12 mA

A: Here, we will calculate the voltage.

Q: 10Ω 20 Ω 4ν 3ν 2A Β 15Ω 25Ω Ε 6V

A: E= 135 Volt

Q: 2. Find: RT = ? IT = ? 9 V R, CR2 R. 90 2 45 2 180 2

A: Given : V = 9 V R1 = 90 Ω R2 = 45 Ω R3 = 180 Ω

Q: Ap.d. of 10 V is needed to make a current of 0.02 A flow through a wire. What p.d. is needed to make…

A: Given: For first case, potential difference V1=10 V, Current I1=0.02 A. For second case, Current…

Q: 5. A constant current source supplies a electric current of 200 mà to a load of 2kN. When the load…

A: Write the given values with the suitable variables. I1=200 mA=200×10-3 AR1=2 kΩ=2×103 ΩR2=50 Ω

Q: Find the current produced by 10^3 particles with charges Q = 2μC each passing a point per second.

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Q: 10. You need a 4.7 M2 resistor from a box of miscellaneous resistors. What coloured bands should you…

A: